#include <stdio.h>

#define ONE (1<<0)
#define TWO (1<<1)
#define THREE (1<<2)
#define FOUR (1<<3)

void show(int flag)
{
    if(flag & ONE) printf("one ");
    if(flag & TWO) printf("two ");
    if(flag & THREE) printf("three ");
    if(flag & FOUR) printf("four ");
    printf("\n");

}
int main()
{
    show(ONE | TWO);
    show(ONE | TWO | THREE | FOUR);
    return 0;
}
